Chapter 220 Academician’s Test, Discourse Trap
“You should know the project you are responsible for this time, right?”
In the office, Yang Anchao asked directly.
"I know, it's the lidar on the lunar exploration satellite."
Hearing what Wang Donglai said, Yang Anchao nodded and said: "Then you must also know that I am Chang'e 5 The chief designer of the satellite, according to the plan, the satellite will be launched in October this year, so there is not much time left for you.”
"Not only that, there are also many domestic laboratories and research institutes conducting research on lidar. We are far behind Western developed countries in this area of technology, so we must vigorously support research and development in this area."
"I say all this just to reassure you. After all, you are the person Xu Songyao and I have mentioned. With your mathematical talent, I don’t think a mathematical modeling is a problem. Yours I also took a look at the artificial intelligence-assisted diagnosis system , I guess many people have not noticed that your computer skills are no worse than your mathematical talent."
"If this project is successful, I can guarantee you that your name will appear. In the project summary."
"What do you think, or if you have any other requirements, you can also put it forward!"
Yang Anchao was very direct, without any politeness. He told me all his reasons for coming.
"I would like to ask, there are many talents in our country, why did Academician Yang find me?"
Yang Anchao was ready to answer Wang Donglai's question, but he did not expect Wang Donglai to ask this question, and was slightly stunned. After a moment, he said aloud: "Actually, it's very simple. Xiao Ding from the 11th Institute recommended you, and I've heard about your talent in mathematics. Plus, you are Young people need more opportunities to show themselves, so I found you."
After finishing speaking, Yang Anchao continued: "If you are worried, you can also withdraw from this project. After all, this is not the place. Space Administration, you don’t have to worry about being blamed by your superiors if you quit this project.”
Wang Donglai was not surprised by Yang Anchao’s answer.
Wang Donglai breathed a sigh of relief when he heard the reasons for choosing himself from his mouth.
As for what Yang Anchao said because he was a young man and needed a chance to prove himself, Wang Donglai did not believe it.
Real scientific research is not about conducting breakthrough research as many people imagine.
Sewing and mending can be said to be an exaggeration.
Only the research of a small number of people will truly play a role in changing society.
Whether it is longitudinal research or horizontal research, graduate students and PhD students are the best workforce.
Just like they don't call their mentor "mentor", but "boss", which is enough to prove this point.
The care fund that Wang Donglai proposed at the graduation thesis defense meeting was to curb this situation at Tangdu Jiaotong University.
Many tutors control students’ right to graduate and squeeze them during their graduate studies.
Let your students serve as drivers, pick up your children, clean, and complete projects to make money for yourself.
If it is a beautiful girl, it is even more dangerous.
Even if you can't meet such a mentor, you still have to bear the mentor's bad temper and accept PUA.
At the moment, Wang Donglai sneered in his heart when he heard that Yang Anchao was painting cakes for himself and beautifying his behavior.
This may not prove that Yang Anchao is an unqualified mentor, but his behavior does not please Wang Donglai.
"Academician Yang, don't worry, the aerospace project is a major event related to the lifeblood of the country, and I will naturally do my best."
Wang Donglai did not put forward any conditions, but said sincerely.
"Okay, that's good if you think so."
"The level of domestic lidar is far inferior to that of developed countries abroad. This is mainly because we started too late and the core technology is monopolized by the West. At present, , the lidar on our country’s satellites is still a traditional mechanical lidar, which has low efficiency and large errors.”
“The Chang’e-5 satellite to be launched this time is responsible for Chang’e-3. The first Earth-to-Moon sampling round-trip probe of the "Sample Return" project is also the third step in "circling, landing and returning", which can be said to be an arduous task. "
"In this way, we have. The responsibility becomes even more important.”
“Lidar is an important part of it, and it plays a large part in whether the mission can be successfully completed.”
"Abandoning traditional mechanical lidar, it is most suitable to use more advanced solid-state lidar based on optical phased array technology."
"Although this technology is advanced, it is also very difficult, which requires you to carry out Breakthrough.”
As the chief designer, Yang An is very knowledgeable about the entire project.
Even the following lidar sub-projects are very well understood, and the opening of your mouth is professional knowledge.
"How about it? After hearing what I said, do you still have confidence?"
After Yang Anchao finished the introduction, he looked at Wang Donglai with some curiosity and asked.
After listening to this, Wang Donglai frowned and said, "Academician Yang, I'm afraid what you said is a little wrong. There is not much difference between traditional mechanical lidar and solid-state lidar. Each has its own pros and cons, adaptable to the venue "
"Oh, you mean I said it wrong? Then please explain in detail what I said wrong!"
The smile on Yang Anchao's face was slow. He calmly calmed down and looked at Wang Donglai calmly.
Wang Donglai was unmoved, not much afraid, and still said calmly: "Traditional lidar is mainly composed of photodiodes, MEMS reflectors, laser transmitting and receiving devices and other components, and can also pass through The MEMS transmitter mirror rotates 360 degrees.”
"As for solid-state lidar, electronic components such as optical phased arrays, photonic integrated circuits, and far-field radiation patterns replace mechanical rotating components to adjust the laser emission angle."
"In this way, because of the internal The difference in structure means that the size of the two lidars is also different. The mechanical lidar is larger and more expensive, but the measurement accuracy will be higher. As for the solid-state lidar, the size is smaller and the cost is lower. , the measurement accuracy is subject to chip algorithms and the like, and the measurement accuracy is better than that of a machine Mechanical lidar is lower. "
"In addition, mechanical lidar can measure 360 degrees of sight and receive more information. As for solid-state lidar, it can only have a fixed angle, and the viewing angle is 120. The degree is almost the same. If it is actually applied If so, three or four units are needed to ensure there are no viewing angle loopholes.”
“With more devices, the damage rate will naturally be greater.”
After saying this, Wang Donglai said. He didn't say anything more, but the meaning was very obvious.
Yang Anchao's face was expressionless, and he didn't know what he was thinking.
The atmosphere in the office also became a little stagnant in the blink of an eye. A silent and heavy feeling of oppression emerged and enveloped Wang Donglai.
However, Wang Donglai remained unmoved at all, as if he didn't feel it.
After a while, Yang Anchao suddenly showed a smile on his face and said cheerfully: "Are you trying to say that traditional mechanical lidar is more suitable for use on Chang'e 5 than solid-state lidar?"
Wang Donglai shook his head, denied it and said: "Academician Yang is the chief designer. I believe you must have your reasons for designing this way. I don't know much about aerospace, so I don't know. Don’t dare to talk nonsense.”
Yang Anchao shook his head funny and said: "You are dishonest."
"You just said so much, don't you just want to say that mechanical lidar is more suitable than solid-state mechanical lidar because of different technologies? The scene is different. Although the last sentence was not spoken, you still pretended that I couldn’t hear it. "< br>
“You are indeed right. Mechanical solid-state lidar is indeed more suitable than solid-state mechanical lidar. However, solid-state lidar has another biggest advantage, that is, the moving laser can emit more energy than a fixed laser source. High power, so the advantages of solid-state lidar far exceed that of machine Mechanical lidar.”
“I didn’t expect that you still have this understanding of lidar. Whether you just read the information yesterday or you knew it before, I have more confidence in you.”
“If this project is successful, I can transfer you to Tsinghua University as a professor. Anyway, C 9 There is also an agreement on talent exchange. Although Tangdu Jiaotong University is not bad, some subjects are still not comparable to Qingbei. "Moreover, the projects that Qingbei can participate in and encounter are far more than those of Tangdu Jiaotong University. With your learning ability and understanding ability, after practicing a few projects, it’s almost enough.”
“If you have an idea, start working hard now!”
Hearing this, Wang Donglai still didn’t understand why Yang Anchao was simply testing himself.
If I hadn’t heard the problem in Yang Anchao’s words just now, then Yang Anchao would never have said the above words to me.
“Ginger is still spicy when old!”
With a sigh in his heart, Wang Donglai became calmer.
"I will not disappoint Dean Yang!"
Wang Donglai didn't say much, he just said this very calmly, but he showed an indescribable confidence.
Yang Anchao nodded and said: "That's good, I'll be waiting for your good news. If you have any technical breakthroughs, you can contact me."
After that, Yang Anchao stood up and left the office.
When he got outside, Yang Anchao said a few words to several people in the laboratory, boosted everyone's interest, and then left in a hurry.
As the chief designer, Yang Anchao has a lot to do, and it is extremely rare to be able to spare time to come here.
Song Hui, Yang Shuai and others looked at Wang Donglai, who had been chatting with Yang Anchao for so long, with a hint of hidden envy in their eyes.
However, no one said anything. After Yang Anchao left, everyone was busy with their own affairs.
After communicating with Yang Anchao, Wang Donglai focused on solid-state lidar.
If it is a traditional mechanical lidar, it is not difficult to catch up with the world's first-class level.
But solid-state lidar is a bit difficult.
If there was no difficulty, Wang Donglai would not be given this opportunity to break through. Therefore, after realizing all this, Wang Donglai's fighting spirit was aroused.
These difficulties include grating diffraction problems, side lobe problems, precision processing requirements, etc., and these are just hardware problems. There are also algorithm problems, and data preprocessing loopback detection problems, which are all major difficulties. .
The development of modern science and technology is no longer the era of simple products in the past.
Often a high-tech product spans multiple professional disciplines and requires multiple professional disciplines to work together to achieve a breakthrough.
Solid-state lidar is an example.
However, I happened to meet Wang Donglai.
After recording these difficulties one by one in his mind, Wang Donglai began to collect information and make preparations in a targeted manner.
Sharpening the knife will keep you from chopping wood.
In the early stage, it is the most efficient way to record a large amount of data first and then turn on [Brain Overclocking] to break through the difficult points.
So, in the following time, Wang Donglai did not perform very prominently.
In addition to completing his own tasks, he also indulged in books and information.
Half a month has passed.
Wang Donglai then put down the core journal in his hand, and a bright color flashed in his eyes.
This half-month of crazy reading allowed him to once again greatly advance the progress of [Physics] and [Computer Science].
Even other subjects have made slight breakthroughs.
“Which difficulty is better to be conquered first?”
Wang Donglai was in a rare dilemma.
There are several difficulties in the breakthrough of solid-state lidar. Wang Donglai didn’t know which aspect he should start from.
However, Wang Donglai did not hesitate for long before he made his decision.
Algorithm!
Anyway, his reputation for mathematical talent has spread, and he also has an artificial intelligence medical auxiliary diagnosis system as an endorsement in computers. It would not be so strange to come up with a new algorithm for solid-state lidar.
Yes!
Wang Donglai is not going to tinker with the original algorithm, but is going to come up with a brand new algorithm himself.
Only in this way can solid-state lidar exert its full power effect according to Wang Donglai's vision.
Wanting to do it, Wang Donglai started building an algorithm.
Wang Donglai's behavior was also noticed by everyone, but no one came forward to interrupt his behavior.
Because in this half month, they had truly seen Wang Donglai's terrifying learning ability.
Since the first day, Wang Donglai has made rapid progress in his knowledge of lidar every day.
In just three days, he surpassed several of their doctors.
It’s not just theoretical knowledge, but also actual hands-on operations. Wang Donglai can often get started after just one glance. After doing it twice, he becomes proficient. By the third time, , they are more skilled than those who have been in the laboratory for a long time.
After seeing Wang Donglai’s terrifying learning ability, everyone was convinced and became more confident in the success of this project.
Unconsciously, the leadership of the project fell to Wang Donglai.
The work of several people gradually changed to be arranged by Wang Donglai. Therefore, while Wang Donglai was building the algorithm, several other people were also busy with other things according to Wang Donglai's instructions.
Originally, Professor Lu should be in charge of this project, but after seeing Wang Donglai's ability, Professor Lu had the self-knowledge to give up the fight for dominance, step aside, and start the fight with conviction.
Just like that, day by day passed.
Wang Donglai’s speed in building the algorithm is not slow. With the help of several people from the project team, and the particularity of this project, all the required information is given, which makes Wang Donglai’s speed of building the algorithm even faster. One minute faster.
While constantly turning on [Brain Overclocking], Wang Donglai also had a new way of thinking about solid-state lidar.
According to the idea in his mind, if it is fully realized, the efficiency of solid-state lidar will be several times stronger than the mainstream solid-state lidar on the market, and it will not be on the same level at all.
Although he had a complete solid-state lidar design in mind, Wang Donglai didn't dare to guarantee it before it was actually completed, so he still implemented it bit by bit.
The first one is that the inter-frame matching algorithm was successfully restructured by him.
(End of this chapter)